Metal culvert.



B. W. HARRIS. METAL CULVERT.

APLIOATION FILED AUG.3, 1908.

904,199, Patented N0v.17,19o8.

BERNHARD u'. nanars, or MINNEAPQLiairinnnsorii.`

" METAL ouIivER'rf` Specification of Letters vIi'atent.

l 'Patented Nov. i7, 1908. j

Application mea August 3, 190e seal No. 446,547;4

To all 'whom it may concern:

Be it known that I, BERN Hann IV. HARRIS,

4 of Minneapolis, Hennepin county, Minneformed t-herei n.

sota, have invented certain new and useful Improvements in Metal Culverts, of which the following is a specification.

My invention relates to metallic tubing or pipe adapted for use as a culvert and the object -of the invention is to provide a simple inexpensive method for securing sections of pipe together to the end that the sections may be shipped separately oli-detached from one another to the point where the work is to be performed and then readily united and placed in the ditch.

My invention consists generally in various constructions and combinations, all as here,-

inafter described, and particularly pointed out in the claims.

In the accompanying drawings forming partof this specification. Figure l, is a longitudinal sectional view illustrating two sections of culvert pipe and the means employed for securing their ends together. Figs. 2 and 3, and 4, illustrate the successive'ste s in the operation of joining the pip(` sec ions to gether. Fig. 5, illustrates a nodieation in the manner of securing the sections to one another.

In the drawing, 2 and 3 represent sections of ai culvert having annular corrugations nl These corrugations resist crushing strain and permit use of metal Aof'a lighter gage in the construction of the culvert. One end of the culvert section is provided with a laterally extending flange at right. angles substantially to the longitudinal axis of the culvert. and terminating in a for- Wardly extending lip rlhis flange 5 forms aseat to receive a similar flange 7 formed on the end of the adjoining pipe section. said flange 7 being outwardly turned 'in the same marmer as the flange 5, 4but somewhat shorter, so that it fits easily Within the lip (3 j until it contacts with the flange 5 and forms a close joint therewith. `lVlien this has been' done, the lip 6 laps by the edge of the flange 7 as indicated in Fig. 3, and the edge of the.

lip is then hammcred'down around the flange ,7, as shown in Fig. 4, until the flanges 5 and ditch to form the completed culvert. vWith this construction, boltsand rivets are climinated and the cost of the culvert lconsiderably reduced. i

In Fig. 5, I have' shown a modification which consists in providing a flange Sthat is turned back upon itself or is bent outwardly into a plane parallel with the longitudinal axis ofthe pipe. .The adjoining section has a similar flange 9 which'is bent inwardly and is adapted to interlock with the flange I8 when the sections are placed togetherl In uniting-the sections, the flange 8 is inserted 'within the end ofthe adjoining pipe sectionvand then the flange 9 is formed by forcing the edge of the pipe inwardly until it inter-locks with the outwardly turned flange 8.' If preferred, these' flanges lmay then be drilled and bolts or rivets inserted therein. This additional securing means, I" dont however regard as essential, as the interlocking flanges will be sufficient to hold the pipe sections together. l

I claim as my invention:

l. A culvert, comprising pipe sections having laterally extending flanges formed y on the ends thereof, the flange at one end of one ipe sect-ion having a forwardly projecting ip parallel substantially with the longitudinal axis of the pipe section, said lip being adapted `to iiiclose the flange of the adjoining pipe section when the sections are placed end' to end and be bent down around the flange of said adjoining section, thereby locking ,the culvert sections together. Q. A metal culvert, comprising cylindrical pipe sections, having annular corrlgations formed therein and laterally extending flanges on the ends of said sections, the flange at one end of a section being of greater width than the flange at the other end of the same section and having its edge bent outwardly in a direction parallel substantially "with the longitudinal o the'pi section "of the -ange'on theabutting section, thereby l receive the narrower a on te en of the if witness whereof, I have hereunto set d saidange so formed Se.: .r a a ted to locking seid sections together. Y 1o abutting pipe section, the two sections fitting my hand this 27th day of July 1908.

end to end without telesoo and the or- BERNHARD W. HARRIS.

wardly mg n f o sind first named Witnesses:

section being scienty embe tepel-mit' RICHARD PAUL, f it to he heeled igiwe; y wound the 2 J. A. BnNe'roN. 

